Combined lock and alarm



A. s. CUMMINGS.

COMBINED LOCK AND ALARM.

APPLICATlON FILED MAR. 28, I921- RENEWED JAN. 4, 1922.

1,423,554. Patented y 25, 1922.

UNN/NGS 2 @NDREW INVENTOR.

ANDREW S. GUJMINGS;

SUUTH TACOMA, WNASHINGTON.

COMBINED LOCK AND ALARM.

Specification. of Letters Patent.

Patented uly 1922.

Application filed. March 28, 1321, Serial No. {156,074l. Renewed January 4, 1322. Serial No. 527,950.

To all whom it may concern MINGS, a citizen of the United States. residing at South Tacoma. in the county of Pierce and State of li asnington. have invented certain new and useful Improve ments in Combined Locks and Alarms. of which the following is a specification reference being had to the accompanying drawlngs.

This invention relates to a combined lock and alarm and has for its object to provide a device of this character capable of being); readily applied to either a window or a door.

Another object is to provide a device of this character wherein any movement of the lock will cause operation of the alarm.

Another object of the invention is to provide a device of this character wherein the alarm serves as a weight for the lock to hold the same in its locked position.

A. still further object of the invention is to provide a device of this character which permits the upper and lower sash of a win (low to be maintained in an open position and yet prevent the entrance of an unau thorized person.

A still further object of the invention is to provide a lock. of this character which is adapted to be disposed at substantial point of the window namelv the junction of the hereinafter horizontal and vertical rails of the sash and so arranged that it is impossible for the lock to be operated from the outside.

With the above and other objects in view, the invention consists in the improved con struction and arrangement of parts to be more particularly described fully claimed and illustrated in the accompanying" drawings in which Figure 1 is a fragmentary side elevation of the upper lower sash showing the invention applied.

Figure 2 is a front elevation of the structure .i own in Figure 1.

Figure is a detailed view of the pawl.

Figure 4 is a side elevation of another form of pawl,

Figure 5 is a side elevation of the pawl in its unlocked position;

Figure 6 is a front elevation of another form of bracket.

Referring to the drawings, A. designates the lower sash of a window and B the upper.

sash. It is of course obvious that the device is not limited 1n use to a window but may be used to entire satisfaction in connection with a door or any closure member. Carried by one of the vertical rails of the upper sash adjacent the lower horizontal rail thereof is a plate 5 having bevelled teeth 6 projecting therefrom to provide a rack means being provided at the end'of the plate for securing the same to the sash. By pro viding a plurality of teeth, the sash may be held in variousadjusted positions.

larried by the upper horizontal rail of the lower sash A. adjacent the plate 5 is a bracket 7 comprising a supporting plate 8. said'supportine plate having a depending; plate'9 provided with openings 10. The bracket engages the end face of the sash. while the plate 9 en rrages the vertical rail thereof. Projecting from the upper portion of the plate 8 is a pair of spaced lugs 11. It will be noted. that the cars 11 also project from one end portion of the plate. that is. the end portion at the junction of the plates 8 and 9. A lug 12 is carried by the plate 8 adjacent the ears 11. and is adapted to extend inside of the window casino or molding to prevent the bracket from being torn off the sash. It is of course obvious that these brackets may be made with right or left hand. projecting ears so that the device may be used on either side of the window sash.

A pawl or shank 13 is provided, the end 14-v of said shank being canted to provide a stop- 15. The end 16 is canted and adapted to engage the plate or rack 5. The end 14 is also provided with an opening 17 adapted to receive a pivot pin 18 which is supported by the ears 11. A bearing 19 projects from one side face of the pawl adjacent the canted portion 16. the purpose of which will be hereinafter described.

An alarm 20 is carried by said side face of the pawl, the alarm being erovided with means for sounding the same. This means is operated by trigger 21 which extends intothe alarm and is slidably mounted in the bearing 19. It will be noted that the end 22 of the trigger isbowed outwardly and in the direction of the canted end 16 so that upon engagement of the canted end 16 with the melt the trigger will also be positioned to engage the rack in a similar manner. The alarm 20 also performs another function, namely. that of serving as a weight for the pawl 13 to urge the same toward the rack when the pawl has been swung by the operator into its locked position.

In order to render movement of the pawl 13 impossible when the sash B is moved by an unauthorized person, there is provided a novel locking mechanism consisting of a key 23 having one end formed into a finger piece 24. One longitudinal edge of the key, is canted as at 25 toward the finger piece 2% to provide an inclined surface adapted to enthe end 15 of the pawl 13. A spring 26 has its end 2'? secured to the intermediate portion of the key 23. The opposite end portion 28 of the spring is secured to the rail of the lower sash by fastening means 9, the extremity of said end portion 28 being imbedded in the rail of the sash.

hen it is desired to lock the sash. the pawl is swung to *ard and into engage ment with the r .k 5 as shown in Figure l. The key is then inserted between the plate 8 and the end of the pawl and is urged inwardly of the bracket by means of the spring The wedge, however, does not prevent the pawl from moving slighlily so as to permit operation of the alarm. It will be noted that the pawl '13, in yiew oi the width of the sash A maintained in an inclined position so that it is'impossible tor the pawl to become accidentally disengaged from the rack. In addition to this the weight of the alarm 20 serves to urge the pawl toward the rack. Should any iorce be applied to the window in order to disengage the pawl "from tlc rack, the relative move ment of the pawl and. the rack will depress the trigger 21. thereby sounding the alarm.

It is of course obvious that eren if the sashes.

A. and B are moved it will not cause disengagement oi the pawl from the rack but instead will urge the pawl into binding engagement or frictional engao'ement with the rack so that the pawl will st efforts to open the sash. To unlock the sash and permit the same to be raised or lowered, the

. key 23 is disengaged from the bracket and positioned in engagement with the outer edge of the pawl 13, as shown in Figure 5, the stop 26 maintaining the pawl substan tially in a vertical position to prevent engagement of the pawl with the rack 5 when the sash is being raised or lowered. If desired, the sash may be maintained in an open position to permit ventilation of the room and at the same time locked in this p0 sition by means of a pawl by constructing the rack 5 relatively long; to permit the pawl to engage the rack at any point, it being impossible for an unauthorized person to on large the opening beneath and above the sash in order to gain an entrance, even after the alarm has been sounded.

In Figure 4C, amodified form of the in vention is shown. In this form the canted portion 15 is removed and a leaf spring 30 secured to the plate 9, the end of the spring being disposed in engagement with the pawl to urge the same toward the raclr. As shown in Figure 6, the plate 9 or the bracket may be removed so as to permit the device to be used in connection with a door, the bracket being secured to the door and the rec t 5 to the floor. The operation is exactly the same as the "form of device applied to the vindow sash.

From the foregoing it will be readily seen that this invention provides a novel de vice which not only serves as a lock for a door or window, but also as an alarm, the alarm being so arranged that it does not interfere with the operation oithe lock and vice versa. Furthermore, its construction simple and in view thereof, it can be readily applied byan unskilled person.

hat is claimed is l 1. it lock and alarm oil the character de scribed comprising a rack carried by a support, a pawl carried by asecond supportand adapted to engage the rack, an alarm carried by the pawl, and trigger means carried by the pawl tor actuating the alarm, said tri ger means being disposed; in engagement with the rack.

9.4K lock and alarm ot the character described comprising a stationary rack, a pawl pivoted to a movable member and. an ranged to engage the rack, an alarm carried hyand movable with the pawl, and an actuatingtrin'ger tor the alarm. said trigger heinn movabl v 'iounted on the pawl and mow able with the pawl to eng go the rack and mi 'able f dependently ot the pawl to actuate the an arm.

3. ill. lock and alarm of scribed comprising a rack carried by a support, a bracket carried by a second support, a mwl pivoted to the bracket, and a key movably connected to the second mentioned support and adapted to be disposed between the pawl and the bracket.

at. A lock and alarm oi the character described comprising a rack carried by sup port, abraelret carried by a second support. a pawl pivoted to the bracket, springmeans carried by the second mentioned support, a key carried by said sp means and adapt ed to be disposed between the :awl and the st to limit movement of he pawl.

the cl'iaracter debl'li Q 5. A. lock and alarm of he character de scribed. comprising a rack carried by a support, br ret carried by a second support, a pr vl pi oted to the bracket, spring means carried by the second mentioned support, a

key carried by said spr ng means and adapted to engage one longitudinal edge of the ANDREW S. CUMMINGS. 

